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Alternating current sensor

An alternating current and sensor technology, applied in the direction of measurement using digital measurement technology, to achieve the effects of short response time, wide measurement range, and simple structure

Inactive Publication Date: 2014-12-17
谭成忠
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Electrode measurement of radial electromotive force difference in current-carrying conductors

Method used

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  • Alternating current sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] figure 1 It is a structural schematic diagram of a cylindrical electric conductor alternating current measuring device. The current sensor is composed of a cylindrical energized conductor 1, a transformer 2, electrodes 3, a data processing system 4, a photoelectric signal communication conversion module 5, and an optical fiber 6; the cylindrical energized conductor 1 passes through the ferromagnetic ring in the transformer 2; two electrodes 2 The contact points with the energized conductor 1 are distributed on a plane perpendicular to the current direction, and are fixed radially on the axis and circumference of the conductor 1; the voltage signal between the two electrodes is amplified and converted into Digital signal; the electrical pulse digital signal is converted into optical pulse digital signal by the photoelectric signal communication conversion module 5 and is led out by the optical fiber 6; the secondary winding in the transformer 2 is wrapped around the out...

Embodiment 2

[0021] figure 2It is a structural schematic diagram of a dumbbell-shaped cylindrical alternating current measuring device. The current sensor is composed of a dumbbell-shaped cylindrical electric conductor 1, a transformer 2, an electrode 3, a data processing system 4, a photoelectric signal communication conversion module 5, and an optical fiber 6. The cylindrical live conductor 1 passes through the ferromagnetic ring in the transformer 2 . The contact points between the electrodes 2 and the current-carrying conductor 1 are distributed on two circles with different diameters. at a radius of r 2 Two contact points on the circumference are connected to form an electrode, and the two contact points are located at a radius of r 1 The other electrode contact points on the circumference are equally spaced. The voltage signal between the two electrodes is amplified by the data processing system 4 and converted into a digital signal; the electrical pulse digital signal is conv...

Embodiment 3

[0024] image 3 It is a structural schematic diagram of an alternating current measuring device for a strip-shaped conducting conductor. The current sensor is composed of a strip-shaped energized conductor 1, a transformer 2, an electrode 3, a data processing system 4, a photoelectric signal communication conversion module 5, and an optical fiber 6. The strip-shaped live conductor 1 is passed through a ferromagnetic ring in the transformer 2 . The contact points of the two electrodes 2 with the current-carrying conductor 1 are distributed over the wide strip surface and the narrow side. The connection direction of the two electrodes 2 is perpendicular to the current direction. The voltage signal between the two electrodes is amplified by the data processing system 4 and converted into a digital signal; the electrical pulse digital signal is converted into an optical pulse digital signal by the photoelectric signal communication conversion module 5 and drawn out by the optica...

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Abstract

The invention discloses an alternating current sensor which is composed of an energized conductor (1), a transformer (2), electrodes (3), a data processing system (4), a photoelectric signal communication conversion module (5) and an optical fiber (6). The energized conductor (1) passes through a ferromagnetic ring in the transformer (2); contact points of two electrodes (3) and the electrifying conductor (1) are distributed and fixed at positions having different distances to the axial line of the conductor (1); a voltage signal between the two electrodes (3) is amplified and converted into a digital signal through the data processing system (4); an electric pulse digital signal is converted into an optical pulse digital signal through the photoelectric signal communication conversion module (5) and is led out by the optical fiber (6); a secondary winding in the transformer (2) encircles the outer part of the ferromagnetic ring; an induced electromotive force across the two ends of the secondary winding provides power to the data processing system (4) and the photoelectric signal communication conversion module (5). The alternating current sensor can realize high insulation and isolation of signal transmission, has the characteristics of being simple in structure and free of magnetic saturation, and can measure an alternating current and a transient current in a big range.

Description

technical field [0001] The invention relates to an alternating current sensor, which has special uses in current measurement and control of power supply and transformation equipment, high-voltage and ultra-high-voltage AC transmission, and can also be widely used in current measurement, control, calibration and Overcurrent protection and monitoring, including instantaneous current detection of railway vehicles and measurement, control and protection of large currents in metal smelting and chemical industries. Background technique [0002] Current sensing and measurement is a research topic widely involved in engineering technology and scientific research, such as current measurement and control of power supply and transformation equipment, current measurement, control, calibration, and overcurrent protection and monitoring of industrial products and equipment. At present, the traditional current sensors include resistance method, current sensor based on Hall effect and fiber...

Claims

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Application Information

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IPC IPC(8): G01R19/25
Inventor 谭成忠
Owner 谭成忠